[PATCH RFC] clk: add support for automatic parent handling
linuxzsc at gmail.com
Mon Apr 25 10:41:32 EDT 2011
On Mon, Apr 25, 2011 at 11:57:45AM +0100, Mark Brown wrote:
> On Mon, Apr 25, 2011 at 10:03:49AM +0800, Richard Zhao wrote:
> > On Thu, Apr 21, 2011 at 01:35:42PM +0100, Mark Brown wrote:
> > > Please bear in mind that due to the fact that we've currently got one
> > > clock implementation per subarchitecture anything off-SoC has some
> > > serious barriers to implementation in kernel. For the system management
> > > units you'd be looking at very new systems, this is a new development.
> > How many arch have off-soc clocks? Where's the source?
> > At least for arm, nearly all is memory mapped clock registers. clk is free
> > to override, we just need abstract the most common things.
> Even for many ARMs it's common for the clock tree to be rooted in the
> PMIC (since it will always be on), and of course the full system clock
> tree will not just include the CPU but also any other digital components
> in the system.
Yes, I see pmic or other on-board osc may be clock source. I just didn't realize
anyone will put them to clk.
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